#define _CRT_SECURE_NO_WARNINGS 1

#include<stdio.h>

int main()
{
	int a = 10;
	int* pa = &a;
	printf("*pa=%d\n", *pa);
	*pa = 20;
	printf("*pa=%d\n", *pa);
	printf("a=%d\n", a);

	return 0;
}